William Henry Dorman's father, also William Henry Dorman was a prominent member of the early brethren.
William Jnr began his engineering career as apprentice to the Royal Mail Steamship Co. in Southampton. This was followed by a spell as Draughtsman at a Thameside Marine engine manufacturer. He eventually became an Engineering Consultant, based in Westminster. His knowledge of metallurgy and heat treatment of metals became important in his future career.
Also see: http://dorman-association.webplus.net/page3.html for a history of the company he founded.